Grease filter



FIG. 1 is a perspective view of a grease filter showing our new design,the broken line drawing of a kitchen stove exhaust air hood is forillustrative purposes only and forms no part of the claimed design, on areduced scale;

FIG. 2 is a front elevational view thereof, the rear view beingidentical;

FIG. 3 is a top plan view thereof, the bottom view being identical; and,

FIG. 4 is a side elevational view thereof, the opposite side beingidentical.

The ornamental design for a grease filter, as shown and described.